Rubber adhesion and friction: role of surface energy and contamination films

刚性球体与有限厚度形状记忆聚合物基底间的橡胶-玻璃粘附

Rubber-to-glass adhesion between a rigid sphere and a shape memory polymer substrate of finite thickness

本文针对刚性球体与有限厚度形状记忆聚合物（SMP）基底的橡胶-玻璃（R2G）粘附问题，通过实验、有限元模拟和理论建模提出等效解析模型，确定临界厚度比，为SMP智能粘附剂设计提供指导。

Contact electrification and the work of adhesion

We present a general theory for the contribution from contact electrification to the work necessary to separate two solid bodies. The theory depends on the surface charge density correlation function, which we deduce from Kelvin Force Microscopy (KFM) maps of the surface electrostatic potential. For silicon rubber (polydimethylsiloxane, PDMS) we discuss in detail the relative importance of the different contributions to the observed work of adhesion.

Rate-dependent adhesion of viscoelastic contacts. Part I: contact area and contact line velocity within model multi-asperity contacts with rubber

In this work, we investigate dissipative effects involved during the detachment of a smooth spherical glass probe from a viscoelastic silicone substrate patterned with micro-asperities. As a baseline, the pull-off of a single asperity, millimeter-sized contact between a glass lens and a smooth poly(dimethylsiloxane) (PDMS) rubber is first investigated as a function of the imposed detachment velocity. From a measurement of the contact radius a(t) and normal load during unloading, the dependence of the strain energy relase rate G on the velocity of the contact line vc = da/dt is determined under…

Friction of rubber with surfaces patterned with rigid spherical asperities

This paper reports on the frictional properties of smooth rubber substrates sliding against rigid surfaces covered with various densities of colloidal nano-particles (average diameter 77 nm). Friction experiments were carried out using a transparent Poly(dimethyl siloxane) (PDMS) rubber contacting a silica lens with silica nano-particles sintered onto its surface. Using a previously described methodology (Nguyen \textit{et al.}, \textit{J. of Adhesion} \textbf{87} (2011) 235-250 ), surface shear stress and contact-pressure distribution within the contact were determined from a measurement of t…

On/off switching of adhesion in gecko-inspired adhesives

In this study, the adhesion-detachment behaviour of a gecko-inspired adhesive pad was investigated to understand the on/off switching mechanisms of adhesion in gecko feet. A macroscopic spatula model was fabricated using silicone rubber, and adhesion tests combining lateral sliding and vertical debonding were conducted. It was observed that the contact state and the adhesion force of the pad vary considerably with the direction of lateral sliding prior to debonding, and that the pad achieves adhesion during debonding even when it loses contact due to excess lateral sliding. These results expla…

橡胶摩擦：理论、机制与挑战

Rubber Friction: Theory, Mechanisms, and Challenges

本文综述橡胶摩擦理论，探讨粗糙基底上的滑动与滚动摩擦机制，强调多尺度粗糙度的重要性，并指出粘附增强、裂纹耗散等未解挑战。